SATHEE: PYQ NEET- Chemical Thermodynamics L-1

Question: The equilibrium concentrations of the species in the reaction $A + B ⇌ C + D$ are $2, 3, 10$ and $6 mol L^{- 1}$ , respectively at $300 K . Δ G^{0}$ for the reaction is $(R = 2 cal / mol K)$

A) $- 137.26 cal$

B) $- 1381.80 cal$

C) $- 13.73 cal$

D) $1372.60 cal$

Answer: $- 1381.80 cal$

Solution:

$\begin{aligned} A + B & ⇌ C + D [A] & = 2 mol L^{- 1} [B] & = 3 mol L^{- 1} [C] & = 10 mol L^{- 1} [D] & = 6 mol L^{- 1} Δ G^{0} & = - 2.303 RT \log K_{eq} & = - 2.303 RT \log \frac{[C] [D]}{[A] [B]} & = - 2.303 \times 2 \times 300 \times \log \frac{10 \times 6}{2 \times 3} & = - 2.303 \times 2 \times 300 \times \log 10 & = - 1381.8 cal \end{aligned}$

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Question: The equilibrium concentrations of the species in the reaction A+B⇌C+D are 2,3,10 and 6 mol L−1, respectively at 300 K.ΔG0 for the reaction is (R=2cal/molK)

Answer: −1381.80cal

Solution:

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Question: The equilibrium concentrations of the species in the reaction $A + B ⇌ C + D$ are $2, 3, 10$ and $6 mol L^{- 1}$ , respectively at $300 K . Δ G^{0}$ for the reaction is $(R = 2 cal / mol K)$

Answer: $- 1381.80 cal$